Simplify cc.IncomingDepIsInSameApex

The libDepTag checks don't need to be in IncomingDepIsInSameApex,
move them back to OutgoingDepIsInSamApex.  This also means that
the fromStatic field in libraryDependencyTag is no longer necessary,
as OutgoingDepIsInSameApex can access c.static() directly.

Bug: 372543712
Test: builds
Change-Id: I1d97a02055460445bfa854f3d9b78f185d4a6a15
diff --git a/rust/sanitize.go b/rust/sanitize.go
index 4c82de5..b8f922f 100644
--- a/rust/sanitize.go
+++ b/rust/sanitize.go
@@ -281,7 +281,7 @@
 			} else {
 				variations = append(variations,
 					blueprint.Variation{Mutator: "link", Variation: "shared"})
-				depTag = cc.SharedDepTag(mod.Static())
+				depTag = cc.SharedDepTag()
 				deps = []string{config.LibclangRuntimeLibrary(mod.toolchain(mctx), "asan")}
 			}
 		} else if mod.IsSanitizerEnabled(cc.Hwasan) {
@@ -296,7 +296,7 @@
 			// library during final link if necessary
 			variations = append(variations,
 				blueprint.Variation{Mutator: "link", Variation: "shared"})
-			depTag = cc.SharedDepTag(mod.Static())
+			depTag = cc.SharedDepTag()
 			deps = []string{config.LibclangRuntimeLibrary(mod.toolchain(mctx), "hwasan")}
 		}